Extech 407510 Dissolved Oxygen Meter<br />Click below to buy on Amazon: http://www.amazon.com/gp/product/B00023RVOI?tag=sukses2015-20<br /><br />Dual display provides O2 or dissolved oxygen and temperature readings <br />Measures dissolved oxygen in water from 0 to 2000mgL and oxygen in air from 0 to 100 <br />Resolution 01mgL DO 01 O2 <br />Automatic temperature compensation <br />MinMaxAverage recordrecall
